Paper-bag machine



(No Model.) r 3-Sheets-She'et- 1.

' W. G. GROSS. Paper Bag Machine No. 239,458. Patented March 29, I881 (No Model.) I v 3 Sheats-Shet-3.

. W. G. GROSS.

Paper Bag Machine No. 239,458. PatentedjMarch 29,1881.

UNITED STATES it PATENT Ormcn.

' 'WIL'LIAMC. onoss, or BosroN, MASSACHUSETTS.

PAPER-BAG MACHINE.

SPECIFICATION formingpartof Letters Patent No. 239,458, dated March 29, 1881.

Application filed January 7. 1881.

To all whom it may concern Be it known that I, WILLIAM G. CROSS, of

- Boston, Massachusetts, have invented certain Theleadingfeature of my improvements con.-

sists in combining, wit-h the carrier whichfeeds along the diamond-folded blank and the mechanism which makes the subsequent fold or folds, a transferrer intermediate between the two, which receives the blank diamond-folded end foremost, and then carries off and presents said blank, month end foremost to the mechanism by which the blank is taken and the flap that overlies the body of the blank folded. This transferrer is composed, preferably, of a power-driven rotating pocketed cylinder-that is to say, a cylinder pro'vided'with a series of pockets or receptacles, in which the blanks successively are received from the carrier, and then presented to thegrasping and folding mechanism. I f V The nature (if my improvements and the manner in which. the same areo'r may be carried into effect will be understood by reference to the accompanying drawings, in whicht Figure 1 is a sectional side elevation of. so much of a paper-bag machine asrequired for the purpose of explanation. Fig. 2 is a plan of the third folding mechanism. Figs. 3 and 4 are diagrams representing the'third folding 1 devices in various positions assumed by them during the making of the fold. Fig.5 is a sec tional side elevation of amodified form of ma chinery used in connection with the pocketed transferring-cylinder. Fig. 6 is a plan of the pocketed transferring -'cylinder. Fig. 7 is a central section of a portion of the same in the plane of the longitudinalaxisof the cylinder.

(No model.)

Fig.8 is a sectional side elevation of a modification of the third folding mechanism.

I have not deemed it necessary to show the mechanism for forming the tubular blanks,

severing the same into bag-blanks, and mak- 'my Letters Patent No. 221,531, of November 11,1879. From this mechanism the diamondfolded blank, with paste properly applied along the center lines of the diamond fold by appropriate paste-wheels E F, can'be delivered to the mechanism which I am aboutto describe; I and with regard to' the mechanism last referred to I remark that, in order to avoid confusion of parts, I have omitted from the drawings the supportingframe and the gearing by which the moving parts of themachine are'connected and driven. Said gearing and frame may manifestly be of any suitable construction and arrangement, as will be understoodwithout further explanation.

The carrier which "I have shown in the drawings is composed of endless tapes 0, running over wheels I) d, and the apron D, running over the rolls 9 '5, and the folding-roll B, a tension-roll, h, being provided for the purpose of keepin g the apron taut. These parts are arranged and operate conjointly in the manner as described in my Letters Patent No. 222,465, of December 9, 1879.

I also employ stationary folding-fingers E, which operate in conjunction with the apron and tapes, as described in my LettersPatent No. 232,945, of October 5, 18 80, to fold the front flap of the blank which moves alongdia; mond-folded end foremost. The blank is dc livered from the carrier diamond fold foremost, and with its rear flap, or that flap which over lies the body of' the blank, still unfolded. In order to put the blank in the best position to havethis flap acted on, I find it of advantage to reverse the blank so as to bring its month end foremost. The instrumentality Which,'in the present instance, I make useof for this purpose consists of a device which I have hereinbefore termed the transferrer. The preferred form of this device is shown the drawings. It consists of a rotating powerdriven cylinder, A, provided with a series of radial, or substantially radial, open-mouthed pockets or receptacles, a. This cylinder is so placed that the mouths of the pockets or receptacles a, as the cylinder revolves, shall at a certainttime come opposite to and in line with the delivery end of the carrier, so that a bag-blank discharged from the latter shall enter that one of the receptacles which happens to be opposite it at the time, and the transfering-cylinderis so specded that it shall,for each blank delivered from the carrier, move through that portion of a revolution about equal to the breadth of the mouth of one pocket. Consequently each time a bag is delivered from the carrier there will be an empty pocket to receive it. The bags enter these pockets diamond-folded end foremost, and the pockets are of a depth less than the length of the blank, so that the month end of the blank will project from the pocket. Each blank thus delivered to the transferring-cylinder is by it presented to mechanism by which the blank is taken hold of mouth-end foremost, and is subsequently formed into a completed satchelbottom bag. It is manifestthat various forms of such mechanism may be used for this purpose. That shown in Fig. 1 consists of a power-driven nipper-cylinder, F, so placed that the mouth ends of the bag-blanks, as they are carried around by the cylinder, will successively rest upon it. In proximity to that point on said nipper-cylinder on which the mouth ends of the bag-blanks rest I place a nipper, 70, which is mounted on a rock-shaft, k, in a recess in the cylinder, and is operated during each revolution at proper intervals to project from the periphery of the cylinder upon the month end of the blank, to retain its hold on the blank for the prescribed time, and then to release the blank and retire within the said cylinder, to again go through the same cycle of operation during the next revolution. It is thus operated by means of a crank-arm, k, on shaft k,held by spring-pressure against the periphery of the cam M, which is fixed to the frame of the machine, and is of proper shape and dimensions to impart (in connection with the usual reacting-sprin g) the above-specified movements, to the nipper. The nipper-cylinder is so speeded as to make one revolution while the transferring-cylinder moves a distance equal to one pocket.

In frictional contact with the nipper-cylinder are the endless tapes G, stretched taut around rolls or wheels I and driven by contact with the power-driven nipper-cylinder. These tapes serve, in conjunction with the nipper-cylinder, to carry along the blank which is by the nipper brought mouth-end foremost between them, and they also act, as do the tapes 0, to determine the line of fold. H are stationary folding-fingers, which, in arrangement and mode of operation, are similar to the stationary folding-fingers E, already referred to.

Assuming the parts to be moving in the direction indicated by the arrows, their mode of operation is as follows: As each blank-filled pocket of the transferring-cylinder comes 0pposite to the nipper-cylinder the projecting month end :0 of the blank 3 comes in contact with and rests on the nipper-cylinder just as the nipper is in proper position to grasp it'and is about to descend, as indicated in Fig. 1. The blank thus grasped is quickly drawn out of the pocket by the revolving nipper-cylinder, and is, as indicated in Fig. 3, drawn along between the cylinder F and the tapes G, which constitute a carrier to hold it firmly in position and determine the line of fold. The nipper then releases its hold on the blank and retires within the cylinder, and the blank is fed along with its unfolded flap l naturally projecting or standing at a tangent to the cylinder. This flap is, by the action of the stationary fingers H, which enter between the body of the blank, folded back and down, as indicated in Fig. 4, and the completed bag is then discharged into a suitable hopper or receptacle, I.

In lieu of using tapes G and folding-fingers H, I can use, if it be found desirable, a roll, J, running with yielding pressure against the nipper-cylinder, in conjunction with vibratory folding-blade K, for tucking the flap 1 down between said roll and cylinder, as indicated in Fig. 8.

In lieu of employing the nipper-cylinder F, such as shown in Fig. 1, I can employ a plain cylinder, L, as shown in Fig. 7 In this figure like letters indicate similar lettered parts in the figures already described. When using the plain cylinder L, I make use, for the purpose of taking the blanks quickly away from the transferring-cylinder, of a belt, M, which is driven from the cylinder L, and extends around this cylinder, in a shallow peripheral groove, m, therein, to and around a loose pulley or sleeve, 41., on the shaft A of the transferring-cylinder A. In order to place this belt where it may operate to the best advantage, I divide the pockets of the transferring-cylinder, as shown in Fig. 6, instead of making the said cylinder continuous from head to head, like the transferring-cylinder shown in Fig. 1, and separate the two parts A of said cylinder far enough to admit between them the belt M. The partitions 0 between the pockets are so arranged as to be tangential, or nearly so, to the hub of the cylinder, the consequence of this arrangement being that the bag-blanks resting on these partitions are, as shown in Fig. 7, kept from contact with the belt until the blanks come opposite to the point at which theyenter, between the cylinder L and the carrier-tapes running in contact therewith. At this time they come in contact with the rapidly-moving belt M, which, by means of numerous small points or projections, with which its surface is provided, carries the blank rapidly out of the pocket and into the bite of the tapes and cylinder. One advantage of the arrangement just described is that a reciprocating nipper is dispensed with, and, further, that itis not necessary to accurately time the movement of the cylinder L, as whenthis nipper is used.

In orderto adapt the transferring-cylinder for different widths of bags, I attach to each head of the cylinder a ring, 19, from which projects into each pocket a plate, r, which bounds the end of the pocket. These rings are, by means of screws and nuts 8 t, adjustable to and from one another, thereby varying the width of the pockets.

In order to vary the depth of the pockets to adapt them to receive blanks of different lengths, adjustable stops may be provided in the bottoms of the pockets. This, however, will be required only with the transferring-cyh inder such as shown in Fig. 1.

Ido not restrict myself to the particular form of transferrer herein shown and described, in illustration of my invention, the requirement being essentially that it shall be a device adapted to receive the blank diamond-fold end foremost from the carrier behind, and to deliver or present said blank mouth end foremost to the carrier in front. It is manifest, also, that the construction of the two carriers themselves may be considerably varied without departure from my invention.

What I claim, and desire to secure by Letters Patent, is-- 1. The combination, substantially as hereinbefore set forth, with the diamond-folded blankcarrier and the mechanism by which the blank is subsequently taken and acted 011 in order to complete the satchel-bottom, of an intermediate transferrer, arranged and operating", substantially as described, to receive the blank diamond-folded end foremost from said carrier and to deliver or present the same month end foremost to the said finishing mechanism.

2. The combination, substantially as hereinbefore set forth, with the two carriers and means, substantially as described, for folding the flaps of the diamond-folded blank, of an WILLIAM G. (GROSS.

\Vitnesses E. A. DIGK, N. 0. LANE. 

